20312651613542 has 16 divisors (see below), whose sum is σ = 31570030979280. Its totient is φ = 9795803845152.

The previous prime is 20312651613539. The next prime is 20312651613559. The reversal of 20312651613542 is 24531615621302.

It is a super-2 number, since 2×20312651613542² (a number of 27 digits) contains 22 as substring.

It is a self number, because there is not a number n which added to its sum of digits gives 20312651613542.

It is a congruent number.

It is an unprimeable number.

It is a polite number, since it can be written in 7 ways as a sum of consecutive naturals, for example, 1623966533 + ... + 1623979040.

It is an arithmetic number, because the mean of its divisors is an integer number (1973126936205).

Almost surely, 2^{20312651613542} is an apocalyptic number.

20312651613542 is a deficient number, since it is larger than the sum of its proper divisors (11257379365738).

20312651613542 is a wasteful number, since it uses less digits than its factorization.

20312651613542 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 3247945687.

The product of its (nonzero) digits is 259200, while the sum is 41.

The spelling of 20312651613542 in words is "twenty trillion, three hundred twelve billion, six hundred fifty-one million, six hundred thirteen thousand, five hundred forty-two".